39b4727ef403fafc452582a54be4f0104f6eb4feac0777f3a56b0bae4bfa8896

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
25/02/2024, 15:43

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General

Target

2024-02-25_8baf8ef1400466968e29634aae487b23_cryptolocker.exe
Size

29KB
MD5

8baf8ef1400466968e29634aae487b23
SHA1

ef6c67e71499663e5c86be9c427573e5e2c4965d
SHA256

39b4727ef403fafc452582a54be4f0104f6eb4feac0777f3a56b0bae4bfa8896
SHA512

0eef48c76dc6740c2312884891b0a8844336f89a38e45707762e61e2561b8c910c910e45a04748c7ad74e99b6281a7d610a1e30d6172280c5f4c3fea17c7cd24
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+pxN:q0zizzOSxMOtEvwDpj/arT

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4916-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00c300000001e848-13.dat	CryptoLocker_rule2
behavioral2/memory/2264-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4916-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2264-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/2264-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4916-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2264-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4916-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00c300000001e848-13.dat	UPX
behavioral2/memory/2264-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4916-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2264-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2132103209-3755304320-2959162027-1000\Control Panel\International\Geo\Nation	2024-02-25_8baf8ef1400466968e29634aae487b23_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2264	asih.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4916 wrote to memory of 2264	4916	2024-02-25_8baf8ef1400466968e29634aae487b23_cryptolocker.exe	87
PID 4916 wrote to memory of 2264	4916	2024-02-25_8baf8ef1400466968e29634aae487b23_cryptolocker.exe	87
PID 4916 wrote to memory of 2264	4916	2024-02-25_8baf8ef1400466968e29634aae487b23_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-02-25_8baf8ef1400466968e29634aae487b23_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-25_8baf8ef1400466968e29634aae487b23_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4916
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2264

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
29KB

MD5
4d816de96e862ac906f3798426569711

SHA1
57fb76a58b66f212c8520ec76b5dfe63bb3c232b

SHA256
5502057e75fbe6754e56ad71971e92de9e22a07eb08e7ff46ccee73e80eec4da

SHA512
acccfce5deb62558e828425d399c6cadf37419c22b98eced7a013b715bc518340371cb3a0ee55ccf4396b8dacb5f1b4f57e8b8b021f0772d9dcb05478d0121d4

Download Submit
memory/2264-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2264-20-0x00000000007E0000-0x00000000007E6000-memory.dmp

Filesize
24KB

Download
memory/2264-26-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2264-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4916-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4916-1-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4916-2-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4916-3-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4916-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download